Definitionen
1.NounAn act of installing."The installation of the new software took only a few minutes."
2.NounSomething installed, especially the whole of a system of machines, apparatus, and accessories, when set up and arranged for practical working, as in electric lighting, transmission of power, etc.
3.NounA work of installation art."The museum is displaying a modern art installation."
4.NounA grouping of facilities that constitute a permanent military base."A military installation was built near the border."